I opened the ebook in Sigil. Here is what the beginning of a chapter looks like (I've changed the text of the book itself...):
<body class="calibre">
<p class="calibre7" id="filepos13245"><span class="calibre11 bold">CHAPTER 1</span></p>
<p class="calibre9 sgc-1"> </p>
<p class="calibre10"><span class="calibre12 bold">CHICAGO, ILLINOIS</span></p>
<p class="calibre9 sgc-1"> </p>
<p class="calibre10"><span class="italic">I</span> <span class="calibre12 italic">SHOULDN’T HAVE</span> <span class="italic">come,</span> Bob Smith thought as he looked at the people around him. <span class="italic">I should have gone far away.</span></p>
<p class="calibre15">But he had answered the phone call.</p>